SELECT
	m.FirstName,
	m.LastName,
	COUNT(e.ManagerID) AS [Employees count]

	FROM Employees e

	JOIN Employees m
		ON e.ManagerID = m.EmployeeID

	GROUP BY
		m.ManagerID,
		m.FirstName,
		m.LastName

	HAVING COUNT(e.EmployeeID) = 5

	ORDER BY m.FirstName